10-17 July 2019
Ghent
Europe/Brussels timezone

Reevaluation of the hadronic vacuum polarisaion contributions to the Standard Model predictions of the muon g-2 using newest hadronic cross-section data and analyticity and unitarity constraints

12 Jul 2019, 15:30
15m
Campus Ledeganck - Aud. 6 (Ghent)

Campus Ledeganck - Aud. 6

Ghent

Parallel talk QCD and Hadronic Physics QCD and Hadronic Physics

Speaker

Zhiqing Philippe Zhang (LAL, Orsay (FR))

Description

The evaluation of the hadronic vacuum polarisation contribution to the muon magnetic anomaly is reappraised using the latest e+e- → hadrons cross-section data. A fit incorporating constraints from analyticity and unitarity of the dominant two-pion form factor allows to significantly reduce the uncertainty in the evaluation at low energy where the measurements are scarce and less precise. The talk discusses the new data and methodical improvements, and presents a new Standard Model prediction of the muon g-2.

Primary authors

Andreas Hoecker (CERN) Michel Davier (LAL-Orsay, Universite Paris-Sud 11) Bogdan Malaescu (Centre National de la Recherche Scientifique (FR) & CERN) Zhiqing Philippe Zhang (LAL, Orsay (FR))

Presentation Materials